I needed a plugin that would allow folks to subscribe to my blog, as well as to email my posts. I hoped MailPoet would do the job, but the accessibility to screenreaders is abysmal, especially when attempting to creat forms. Fields are not clearly labeled, at times elements do not expose their attributes to the screenreader, some elements seem to be represented by nothing but weird unicode characters, i.e. 61713, dropdown lists appear not to be accessible via keyboard, etc. Bear in mind I'm not the type who can't find their way around in a paper bag, much less WordPress. I've hosted WordPress sites for 4 years, & I contribute both in the accessibility & support forums.

Perhaps this is a good plugin if you can see. If not, save yourself the headache & don't bother. As for me, I'm off to take some Ibuprofen--& to try to find something else that will allow sight-impaired individuals equal access.

I hope someday I can update this review & give this plugin 5 * because the authors did the right thing & made it usable by all. One can always hope.

MailPoet Newsletters- I get an image margin or border that overlaps text to the side and crops about 5 pixels off the text in all the themes I've tried. Before and after the latest updates...this is happening in Outlook 2013.

We are very serious about all our email optins with WordPress and any online presence. We have been using FREE PHPLIst for many years with few issues. In Sep 2012, we decided to move forward and pay for this plugn. After a month, we noticed a huge drop in email opt ins and sales conversions. It ended up being this plugin made it quite easy for people to unsubscribe from your newsletter which pretty well stalled the growth of the business. As this being a critical part of any online business, we only used Wysijs for email captures which worked fine up until today. We noticed over 200 spammy emails cpatured by this plugin where we literally lost dozens of valid emails since Friday. We had to do emergency surgery to the email capture to restore our original PHPList settings which was put back to our pre September period. Our email capture is mission critical for us as we need 24/7 support for any product like this. We cannot afford to wait for fixes as our real time site is still capturing spammy emails. We lost complete faith in this product and therefore dumped it which is now been fully restored with PHPList. With their Flash capture optin feature, I would figure that this will be a very high risk security breach for any business using this plugin. It all comes down to a cat and mouse game as the WYSIJA patches will not be sufficient. Take heed if you use this plugin.
Don't get me wrong, I like this plug a lot with their awesome newsletter feature but it is too high risk to use for our operation. I am just posting this as warning and our experience with Wysija.
P.S. And yes we always use the latest security patches and updates of the plugin.